When I heard that Facebook changed something again, eliminating the application profile pages, I was very disappointed. I didn’t use the application profile pages, but these pages were useful because of the “add to my page” link. Immediately after this announcement
Removing App Profile Pages
By February 1, 2012, we are removing App Profile Pages. You can migrate Likes and the Vanity URL of this Page to an existing Facebook Page with the same name and of Product/App category. Please read our blog post for detailed instructions for how to do this: https://developers.facebook.com/blog/post/611/
People came with all sorts of solutions, scripts which facilitate the “add to my Page” . But this is the easiest way to add apps to your Facebook page. You should save this link somewhere on your computer:
Put your app ID instead of YOUR_APP_ID and url to canvas page instead of YOUR_URL.
That’s all. Have fun!